PDP context dropped after enter PSM

My understanding is PDP context should be retained through PSM. but whenever I enter PSM , the PDP context is explicitly dropped (with URC indication of pdpdeact). Is this done by module automatically or from network?

is this the right behaviour ?

I’ve tested on BG95 and 96

it right behavior , when the module stay in PSM mode , Network attachment will be kept , but RRC and PDP context will be released

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@Stephen.Li-Q Is it the same for other modules as well? When using BC66 my understanding is that PDP context is kept.