I disabled all my shell extensions and now the situation is much better despite some noticeable cursor lags.
However shell became almost unusable because missing features lol.
I noticed another problem since Gnome 3.26.2: shell becomes very slow when unlocked (no high cpu/ram usage is detected) after several hours. When my several extenions were still enabled, shell became so slow after session unlock that a session restart was required to I use shell again. With all extensions disabled, shell performance is also slow when session is unlocked but it to normal some minutes later.
I disabled all my shell extensions and now the situation is much better despite some noticeable cursor lags.
However shell became almost unusable because missing features lol.
I noticed another problem since Gnome 3.26.2: shell becomes very slow when unlocked (no high cpu/ram usage is detected) after several hours. When my several extenions were still enabled, shell became so slow after session unlock that a session restart was required to I use shell again. With all extensions disabled, shell performance is also slow when session is unlocked but it to normal some minutes later.