Percentage formatting issue

A cells value shown in formula bar differs from cells original value after formatting as percentage. Doesn't matter if formatted by button or Strg+1 menu.

In my case all values between 4,1 to 4,199[9] and 5,1 to 5,199[9] seem to be affected. Haven't verified other values yet.

Gnumeric Version 1.12.45 on Ubuntu 18.04.