Multimonitor conflict when starting Intellij (Linux)

Linux Mint, NVIDIA graphics card (TU117 [GeForce GTX 1650), with 2 monitors (different refresh rates), spanned display. On starting Intellij programming editor, the right (secondary) display consistently turns off. Each time I can restore the display using the display manager, only to crash again on subsequent boot.
The problem has never happened before with any other software. (3 years heavy use)
Both Linux and IDEA fora blame the ‘other’ technology.