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I hear a lot of speak about 147gr in a Glock 43... It is not uncommon for the pistol to have issues feeding 147gr ammo. I had to use 124gr HST in my G43 as the slight OAL increase on the 147gr ammo caused it to have malfunctions feeding. I have been able to reduplicate this issue on more than one G43 actually 5 in total.
OP Winchester Ranger, Speer Gold Dot, or Federal HST are all good loads I would be ok with any of those. I would option for the standard pressure personally as the benefit of +P really is not a benefit as they tend to preform basically the same as standard pressure but with more recoil. I would choose any of the 3 brands in 124gr standard pressure.
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It may not be the length difference.
The longest length hollow point loads I've seen are the Remington 147 grain bullet loads.
The problem with those is fitting some nicro pistol magazines.
Most 147 grain bullet loads are shorter than those though.
Early 147 grain bullet ammo had a problem with so little powder, they wouldn't fully cycle all pistols.
With newer powders, a lot of the 147 grain bullet loads have a bit more velocity now, but powder capacity is still limited.
With a new Glock 43, maybe an issue with a borderline weak powder charge and stiff new springs.
Maybe the 147 grain HST load is just milder than some others.
That wouldn't be a good thing.
Federal did discontinue the +P 147 grain HST load.
There wasn't much difference in velocity, but some difference in recoil.
I like 147 grain bullet loads in short barrels, because they are mild and they lose very little velocity, compared to a standard 4 inch barrel.
124 grain bullet loads have just barely more recoil, but a lot more muzzle blast.
The additional powder with 124 grain bullets, along with the recoil is likely enough to move the slide a bit more strongly.
The 124 grain bullets do lose more velocity in short barrels, compared to 4 inch barrels.