Lubuntu 18.04 LXTerminal - strange behavior?

On a Dell Latitude 3540 laptop, sometimes an open LXTerminal window will "go funky" after suspend/resume, and result in the following behavior:

What seems to happen is,

• Linefeeds are ignored.
• Tabs are all different sizes.
• Typed text does not echo to the terminal at all.

(Here at the first prompt I typed 'ls', then 'cd Downloads', 'ls' again, then 'cd ~' and 'ls'.)

Any idea what is going on, and is there a way to fix this without closing the terminal and re-opening it?

I have Oibaf's drivers installed, but doubt this is purely a video issue.