Dangerzone

Have you tried VAICOM? In addition to the very immersive voice commands that can be given - I believe they also have chatter functionality built in. If you haven't checked it out, it might be worth a look.

I believe this is correct as is. Yes - it's just been introduced with the latest update, but I'm fairly sure it's correct as per the Operations for the Block 20 F/A18, and the change is to have the bingo behave as it does in real life. 
Edit: From the ops manual. (A web search on the below text should give you external references to manuals if you wish to double check, as I'm not going to post external links to PDF files here):
The “Bingo” voice alert is activated when the BINGO caution comes on. With MC OFP 19C, the ″Bingo″ voice alert sounds every 30 seconds until the BINGO fuel level is set below current fuel on board.
The correct procedure is to set a new bingo level. This method ensures that the pilot keeps hearing bingo, incase it's missed during a radio call, RWR or other distractions.
 

OK - I've just found the problem.
For some reason, under the Options->Misc tab, there's a checkbox called "Force feedback". This was checked. Unchecking it seems to have resolved the problem.

Can you please provide Track files so we can see what you're doing and what your SHOW settings are configured to? By default I don't believe that Targets/Threats are boxed, so you need to turn these on in order for both your target points to be shown as well as other threats. 

OK - I think I may have found something. 
I can task switch to numerous programs and DCS will run in the background OK. 
As soon as I task switch to Edge - and switch some tabs in Edge- it seems that DCS stops in the background. It randomly starts again (I'm looking at the clock/time in the top-right hand corner of the F10 map - it literally stops but no pause icon shows up).
DCS switches to 0.1% and 0.0% usage (but no message about process not responding).
Once it kicks back in - it's back around 10-13% process.
Maybe Edge is doing something funky with other processes when it's open. IDK. I'm running in high performance on the power settings, so not sure what Windows is doing there. Anyway - it seems while doing dev work I should keep edge closed, or otherwise maybe use another browser.