Two brand new Sharge Icemag 2 power banks have issues being charged, BMS issues?

I made a post on r/sharge a few days ago about an issue i had with my BRAND NEW Icemag 2. When it got towards the end of its charge cycle (4/4 LEDs) the wattage would slowly decrease like it should...then when it got to about 10w it would stop charging, start charging, then stop, over and over and over. At first I wasnt too concerned, I figured that it was a slightly wonky BMS that had a hard time stopping input to the battery. I figured that when it started this infinite on/off loop, that meant it was done charging.

So I used it for a few days and everything worked perfectly UNTIL it came time to charge it again. This time, it was barely on the 4th light for a minute or so before it started this infinite loop. Used it to charge my phone and within 5 min it was already on 3/4 LEDs (indicating 75% or less SOC).

At this point, I decided to contact Amazon and get a replacement coming.

So, today I get my replacement Icemag 2. I plug it in to fully charge it, as you do with any brand new power bank, and I sit and watch it to see how it behaves. After over 30 min of the 4th light blinking, indicating that it is almost full, the unit is STILL pulling a full 26-27w. This is concerning because after being on the 4th LED charge indicator for that long, you would think that it would start lowering input wattage. But it didnt. So I keep watching it to see what it will do, and after a few more minutes it finally shuts off. Great, everything is working as it should. WRONG AGAIN. The 4th light was still blinking, but the fan and RGBs were off and my cable was showing it was still charging at about half a watt. I leave it plugged in for a few more minutes then BOOM, it randomly starts charging again at its full 27w. I wait a bit more and it shuts off again, but the 4th light never stops blinking. So basically it was doing exactly what the first unit was, except taking longer between turning on and off.

So I want to know what you guys think about this. Is this just a quirk of the Icemag 2? Do they all act weird when charging? To have two seemingly faulty/misbehaving units in a row tells me Sharge's quality control is GARBAGE. I have admired Sharge for a while, i like their designs but this is my first Sharge product. I really like the power bank, the transparent case, lights, quick charging etc. But now i am at a loss. Im trying to decide if I should send the new one back and get a refund and go buy an Anker, Ugreen or Iniu magnetic power bank, or just put up with the strange charging behavior of these Icemags.

Any input or thoughts are appreciated, thanks.