Not sure how much to read into it, but Cheroben only managed silver in the 10000m at the Asian Games on Sunday.
https://en.asiangames2018.id/sport/athletics/event/athletics-men-10000m/phase/atm100100/
Only ran 29:00 and lost by 25 seconds to a guy with a 27:38 PR, Hassan Chani (although Chani did run that PR this year, in June).
Cheroben never has been that great of a track 10K guy, with "only" a 27:11 PR and no great placing at Worlds/Olympics (12 in London and 10th in Rio), and the conditions in Jakarta were probably far from ideal for a 10K, but still ... even pace for the Half WR would take you through 10K in 27:39, so maybe not a good sign that he couldn't hang on in a 28:35 race on the track only 3 weeks before this half in Copenhagen.