Next update: attached there are 2 logs from swank (I enabled swank:*log-events*).
- log 1 is from desktop REPL (which works) - log 2 is from tablet REPL, which disconnects after 1, sometimes 2 seconds
The error message shown in Emacs is:
Error running timer `slime process available input': (error "Selecting deleted buffer")
(Maybe I need to ask on Slime mailing list.)