Ceiling on esc cards

Apologies if this has been covered elsewhere but I couldn't find a thread on it after searching.
Game 19616026
Although in Overview the value of trades has been increasing, the actual number of troops received when cashing has stopped at 32,767 for each of the remaining three players for a couple of weeks now.
Can anyone explain this anomaly? It's a really odd figure, 32,767, and I'm wondering how it was calculated and why trades aren't escalating any more (despite the Overview stating they are)?
Thanks
Game 19616026
Although in Overview the value of trades has been increasing, the actual number of troops received when cashing has stopped at 32,767 for each of the remaining three players for a couple of weeks now.
Can anyone explain this anomaly? It's a really odd figure, 32,767, and I'm wondering how it was calculated and why trades aren't escalating any more (despite the Overview stating they are)?
Thanks