Bombards have been gaining numbers similarly to other units for a while now.
That is...very suspicious. You should be seeing either
-The AI getting them in roughly ship cap ratios
-The AI getting almost only them, but in smallish numbers or acculmulating at severly diminished rate
-The AI getting about the same of them as other ships, but with both overall numbers taking a big hit, and a moderatley hurt build-up rate
Which case depends on what the AI was trying to do with, whatever it was building, but in any case, it would have had to pay harshly in either numbers or opportunity costs (it could of gotten many more ships if it chose a higher cap ship)
If it isn't (and you have the actual calculations as given in the logs or very consistent observed quantitative data across multiple games to lend strong evidence towards this), then there may be a big problem happening with how the AI is (or rather, isn't) paying properly at some stage for some mechanic.
EDIT: Suspicious on the part of the game, not in the sense that I am doubting you.
Except enemies that outrange me and have the burst to instantly kill the entire fleet.
One of the reasons why I think they need a nerf overall as well (for both AI and humans). Strong alpha + long range gives a utility benefit which far exceeds what cap DPS would ordinarily imply.