No idea whether bug reports will even be looked at or not, but whatever.

I signed up for another account with the Uplink bank, and kept my primary account as my first one. After logging in to the second account, I clicked on the bank account of the first one (which should've logged me into the other account) but the game crashed.

That happens with bank accounts.

The solution: don't create bank accounts!

Really? Never was a problem for me.

Happens sometimes, not sure why.

Never had this problem. And always create bank accounts, assuming you want to hack into banks. It's the best way to go about it.