Although I haven't seen such a thing you need perhaps in that app to examine the varmint-chewed part for a possible tertiary winding in that coil that may have served as a trap for this malady you mention. They do have them in TV sets to trap the sound subcarrier. There may be one for each the high and low VHF bands sprinkled throughout the IF chain...
Sometimes in my dim dark past of doing old TV resto the best solution in IF chain work was to reconstruct the old coils rather than to try to make the aftermarket "hammer-to-fit" coils do the same job with satisfactory results. Usually in my experience I was sometimes happy, and mostly not with the results--sorry to say.... Something makes me want to remember that in a lot of TV sets I've encountered that the final IF can is sometimes critically designed...
At the very most I may have provided a nugget of a hint at your solution, but I am tending to doubt it. At least I have bumped you back up the scale for wiser heads to get a look-see.
Been a long time (try over 30 years) since I've delved in TV resto, so please forgive me if I preach to the choir here. Good luck in your sleuthing, and may others more well-informed apply here.
