bug#61667: 29.0.60; Failure to redisplay

[Gregory Heytings]

> One of the sides is subtly wrong -- not sure which one -- but other 
> applications don't seem to exhibit the same buffering problem, so some 
> sequence of action which would fix our situation should exist.

I think adding this:

(add-to-list 'find-file-hook #'redisplay t)

at the end of your init file will probably "fix" (in the sense of 
circumventing) the problem.