I have never experienced it, and I think it may be because of the large amount of value or it's because of the different transaction destination factors from one market to another, and the amount is quite large for transaction costs.
yes you are right that it depend on types of transaction i means that now a days the price of bitcoin is really increases and thats also the reason that the fees increases in transaction.
The fees are very low now.
To reduce them you should send your btc during low traffic time.
Have you ever tried to follow this criteria?