I just tried again, and when I hit the 4th app they all start failing so I now have one.
However, in the process list I still see them, they just disappear from unity.

phablet   4922  0.0  0.8 232980 15232 ?        T    13:13   0:00 webapp-container --enable-back-forward --webappUrlPatterns=https?://*.bbc.co.uk/news*,https?://*.bbc.com/news* http://m.bbc.com/news
phablet   5109  0.0  0.8 232976 15232 ?        T    13:14   0:00 webapp-container --enable-back-forward --webappUrlPatterns=https?://*.bbc.co.uk/sport*,https?://*.bbc.com/sport http://m.bbc.com/sport
phablet   5308  0.1  0.8 232972 15240 ?        T    13:14   0:00 webapp-container --enable-back-forward --webappUrlPatterns=https?://giffgaff.com/* http://giffgaff.com/?m=1
phablet   5483  0.0  0.8 232988 15244 ?        T    13:14   0:00 webapp-container --enable-back-forward --webappUrlPatterns=https?://*.untappd.com/* http://m.untappd.com/
phablet   5692  0.1  0.8 232976 15248 ?        T    13:15   0:00 webapp-container --enable-back-forward --webappUrlPatterns=https://plus.google.*/*,https://accounts.google.*/* https://plus.google.com
phablet   5898  2.8  3.5 530856 67328 ?        Tsl  13:16   0:04 webapp-container --enable-back-forward --webappUrlPatterns=https?://*.bbc.co.uk/news*,https?://*.bbc.com/news* http://m.bbc.com/news
phablet   5937  0.1  0.8 232976 15228 ?        T    13:16   0:00 webapp-container --enable-back-forward --webappUrlPatterns=https?://*.bbc.co.uk/news*,https?://*.bbc.com/news* http://m.bbc.com/news

phablet@ubuntu-phablet:~$ ps aux | grep oxide
phablet   4923  0.0  0.0   1568   288 ?        T    13:13   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/chrome-sandbox /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   4924  0.0  0.5  95384  9824 ?        T    13:13   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   4929  0.0  0.1 104600  2916 ?        T    13:13   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   4980  0.9  2.1 193196 40196 ?        Tl   13:13   0:03 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=renderer --disable-accelerated-video-decode --disable-delegated-renderer --enable-threaded-compositing --lang=en-US --enable-threaded-compositing --channel=4886.4.1760984022
phablet   5110  0.0  0.0   1568   288 ?        T    13:14   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/chrome-sandbox /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5111  0.0  0.5  95384  9824 ?        T    13:14   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5115  0.0  0.1 104600  2916 ?        T    13:14   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5158  0.8  1.9 207340 37220 ?        Tl   13:14   0:02 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=renderer --disable-accelerated-video-decode --disable-delegated-renderer --enable-threaded-compositing --lang=en-US --enable-threaded-compositing --channel=5074.4.17772142
phablet   5309  0.0  0.0   1568   288 ?        T    13:14   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/chrome-sandbox /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5310  0.0  0.5  95384  9824 ?        T    13:14   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5313  0.0  0.1  95384  2560 ?        T    13:14   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5334  0.7  1.9 188548 36344 ?        Tl   13:14   0:02 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=renderer --disable-accelerated-video-decode --disable-delegated-renderer --enable-threaded-compositing --lang=en-US --enable-threaded-compositing --channel=5272.2.1355835206
phablet   5484  0.0  0.0   1568   288 ?        T    13:14   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/chrome-sandbox /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5485  0.0  0.5  95384  9824 ?        T    13:14   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5488  0.0  0.1  95384  2560 ?        T    13:14   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5511  0.4  1.6 181768 31724 ?        Tl   13:14   0:01 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=renderer --disable-accelerated-video-decode --disable-delegated-renderer --enable-threaded-compositing --lang=en-US --enable-threaded-compositing --channel=5435.2.595382734
phablet   5693  0.0  0.0   1568   288 ?        T    13:15   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/chrome-sandbox /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5694  0.0  0.5  95384  9824 ?        T    13:15   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5697  0.0  0.1  95384  2568 ?        T    13:15   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5718  1.7  0.0      0     0 ?        Z    13:15   0:04 [oxide-renderer] <defunct>
phablet   5938  0.0  0.0   1568   288 ?        T    13:16   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/chrome-sandbox /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5940  0.0  0.5  95384  9828 ?        T    13:16   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   5943  0.0  0.1  95384  2560 ?        T    13:16   0:00 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=zygote
phablet   6026  1.4  2.1 193180 39884 ?        Tl   13:16   0:02 /usr/lib/arm-linux-gnueabihf/oxide-qt/oxide-renderer --type=renderer --disable-accelerated-video-decode --disable-delegated-renderer --enable-threaded-compositing --lang=en-US --enable-threaded-compositing --channel=5898.4.1791797449