Because North Indians drop the trailing schwa (including in parts of compound woods). Annoyingly enough, a lot of them will insist you’re pronouncing it “wrong” if you don’t drop the schwa in your own pronunciation.

Hindi pronunciation of Sanskrit words makes it so (what's called schwa deletion).

In Hindi and some other Indian languages, it is common to drop the last short “a” of a Sanskrit word, hence Ram for Rama, Vikram for Vikrama, etc.

Also, Taxila/Takshila here in Sanskrit is तक्षशिला (takṣaśilā).