Could IntelliJ stop certain things from happening, swallow events/messages that it sees, when it knows is it resource constrained? I know I'm thinking of the weird and ridiculous, but that sometimes helps... I'll try on a smaller project...
So it works fine when my machine not 'taxed'. When I'm doing that form it is in colour! I'm not saying I've found the primary cause thou...
Luckily this time I got the failure I also got a Cursive crash. Sent you the exception report.