MongoDB Atlas throws error with $in operator - mongodb

Question

I have developed an app with local version of community MongoDB (v4.4). Now I've connected to Mongo Atlas (it's running v 4.2).
I'm running a watch command to create a changestream.
While with my local setup everything works, with atlas I get an error
MongoError: Error validating $match value for change streams. err=ns field has bson.D value that is not string or valid MongoDb RegEx: Error parsing value [{$in [somestring1 somestring2 somestring3]}] to RegEx: Must specify $regex field
The query, resp. watch pipeline is
Database.watch([
{
"$match":{
"ns.coll":{
"$in":["somestring1","somestring2","somestring3"]
}
}
}
],
{fullDocument:"updateLookup"}
)
I've changed it to $or alternative:
Database.watch([
{
"$match":{
"$or":[
{"ns.coll":"somestring1"},
{"ns.coll":"somestring2"},
{"ns.coll":"somestring3"}
]
}
}
],
{fullDocument:"updateLookup"}
)
This works correctly.
The Database is a connection from nodejs driver. And the error is an immediate response from atlas server after calling the watch.
The error has also this properties:
ok: 0,
code: 8000,
codeName: 'AtlasError'
What's the problem? What can/should I do about it?
While the workaround works, I guess it is less performant.