Hello @thebest018. Thank you for reporting this possible bug to our attention. Please file a ticket to support here so that this is investigated further.
Champs will often drop a little in Rating when you initially rank them up and while they are at low Level within their new Rank. Has been seen in several other threads for various champs.
You need to Level them up afterwards in order to surpass their previous Rating again (your pic is only r3/Level 3, level her up a little more before she is back higher than when she was r2/Level35)
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Hello @thebest018. Thank you for reporting this possible bug to our attention. Please file a ticket to support here so that this is investigated further.
You need to Level them up afterwards in order to surpass their previous Rating again (your pic is only r3/Level 3, level her up a little more before she is back higher than when she was r2/Level35)