Strange cursor behaviors

In some files opened with PSPad, the vertical cursor stops flashing and remains fixed on a place, but inserting on the desired place works (without having a flashing cursor there ...).

At the same time in other open files cursor desplaces where clicked in code.

Note: all files are of the same type.

PSPad Version 687 64bit, Win10 64bit

If you will find way how to simulate it, write me please.
Can you test 32b version? Simple replace your 64b version.

Edited 1 time(s). Last edit at 2021-10-12 17:10 by pspad.