F-List Throttling and Blocking messages after ads running

[RevanAnders]

F-List has been throttling/blocking my message output of late after setting autoads on three simultaneous tabs (characters). Sometimes this happens with just one tab/character going on, and creates a huge problem where, even after stopping the ads, some messages sent to other players via IM will not reach them despite appearing on my end. This issue remedies on its own after restarting the program via killing all of its instances.

Example:

Me: Sends RP emote number 3
Partner: Sends RP emote answer number 3
Me: Sends RP emote number 4
Partner: "Are you still there? I am still waiting for your number 4 reply!"
Me: "But I already sent it 15 minutes ago!"

This never happened before even after years of vigorous ads running on the background, so I am not sure if it is a case of F-List servers bottlenecking connections from my ip out of a sudden or a bug on the application.