No one's mentioned this problem in the snap once & I expect the Wayland by default Electron version is why, yes. I try keep deviation as little as possible from upstream but Wayland was too spicy to pass up, and apparently has been incredibly fortunate for KDE users.
The snap has nearly 30,000 weekly users now, it's had 38.2 since the day it was released. I know the testing of further patch releases suggested there might be some issues but I'd potentially suggest it's worth having a 3.4.13 release with Electron 38.2 just for this issue alone tbh, the 38.2 release has been very smooth in snap land.
other than the Templates plugin being totally useless now
Out of curiosity what breaks using this plugin? As an external plugin it might be hard to do anything about unfortunately, and I've not tried it myself, but maybe it can be made to work with a workaround.