Comment 3 for bug 1873690

I have the same problem it seems on a fresh Ubuntu 20.04 beta iso.
Apps like Thunderbird or Firefox do not appear as installed but, oddly enough, some such as Shotwell,Libre Office and Cheese do.
Unlike the op, I did not encounter any issue during the installation however.

snap-id: gjf3IPXoRiipCu9K0kVu52f0H56fIksg
tracking: latest/stable/ubuntu-20.04
refresh-date: today at 12:50 CEST
channels:
  latest/stable: 20191114.a9948d5 2019-11-14 (209) 44MB -
  latest/candidate: 3.31.1+git187.84b64e0b 2020-04-20 (415) 45MB -
  latest/beta: 3.36.0-74-ga164ec9 2020-04-22 (433) 52MB -
  latest/edge: 20200414.ac9047f 2020-04-14 (375) 50MB -
installed: 20200415.e028804 (394) 51MB -