Madison's "salary grab" amendment was introduced in 1789 and finally ratified in 1992 as the 27th Amendment.
The business of placing ratification windows in amendments started with the 18th Amendment and has continued ever since. Madison's 1789 amendment did not have a ratification window specified, therefore it was capable of ratification at any time after Congress passed it by two thirds margins, which was in 1789. It took 203 years to finally be ratified.
Congress objected to the Archivist of the United States' decision to accept the final ratifications, but the Archivist wrote congressional leadership a masterly memo that quoted every Supreme Court decision relating to the amendatory process. Congress could have taken the Archivist to court, but 1992 was an election year with an anti-incumbent bias. Deciding that discretion was the better part of valor, Congress backed down and passed the joint resolution officially welcoming the 27th Amendment into the Constitution.
Wow, it really did. Was not aware of it.
The time limits they have been placing on the amendments is to dela with exactly this situation of having something hang for literally 200+ years. If it takes that long to get an amendment passed it probably is not a good one or by then it’s antiquated/outdated and could actually be considered unconstitutional if scotus rulings have occurred on the subject in the meantime.