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It isn't just Nasdaq. Another exchange operator, IEX Group Inc., said in March that it would stop accepting investors' orders in Class A shares of Berkshire Hathaway "due to an internal price limitation within the trading system." It's the stock-market version of the Y2K bug...
Here's the trouble: Nasdaq and some other market operators record stock prices in a compact computer format that uses 32 bits, or ones and zeros. The biggest number possible is two to the 32nd power minus one, or 4,294,967,295. Stock prices are frequently stored using four decimal places, so the highest possible price is $429,496.7295.

https://tech.slashdot.org/story/21/05/05/1454246/berkshire-hathaways-stock-price-is-too-much-for-computers