no he hasn't
the rare couple of times he used it don't count as him having one in modern times.
This is because it is PIS by definition (not enough occurences combined with the last occurence before most of us were born.) and in one of the only few instances it occured in was questionable (since we don't know if the power actually came from him or mephisto).
First of all, back in the day (many years ago) marvel had many plot devices put in to increase sales of their comics. Also, different writers over the years at marvel hq have different opinions on what powers a character has. That is why a character must not only perform a feat a statistically amount of times but they must perform a similar feat spread out throughout their careers. This is the thought process behind PIS. If you read the forum rules on the true definition of PIS then you will see that it is not a fallacy.
If a character uses a rare plot device power once then why should that be acceptable as evidence when it is actually against forum rules?
I get tired of people trying to tell me what happened in comics I ****ing own and have read. Nearly 700 issues of Thor read and people still try to convince me they know so much more.
Thor has conjured shields at least 10-20 times.
He's made them so he could fly through lava.
He's made partial shields to deflect debris.
He's made full body Shields to protect Sif.
He's made shields over an entire village.
He's done it enough for it to be canon.
Where you went wrong at is saying "If a character uses a rare plot device power once then why should that be acceptable as evidence when it is actually against forum rules?". Rare or not, Thor is capable of doing so. His powerset allows it AND he's done it. Because of that, it's allowed.
For example, Flash has IMP'd people, rarely, but he has. On here, he's allowed to do it every time because it's in his powerset, it doesn't contradict his powers and he's done it in the past.
I have over 50 Thor comics (not 700 though but some are more than 20 years old)and the last time thor used a shield was before most of us were born. It is not in his power set.
Marvel has stated his power set plenty of times. Do you think writers at in modern times (from 90-now) at marvel agree for thor to have a forcefield. The answer is no!
And lastly, my reasoning is not based off what makes sense or what should be fair but solely on forum rules. And it is not PIS but SmvFL.
I quote from forum rules
SmvFL is a feat that "is not repeated or is rarely repeated again relative to the character's overall established career, as well as the character's opponents' established showings. In statistical terms, it is an outlier, something that is radically beyond the character's established capabilities ."