Comments. Comments. Hell yeh, we got comments!!!
You are correct to question the appearance of this solder connection. Based on your description, it's defective. Well at best, it's VERY suspect.
That's the rule. If it's suspect, question it.
Here's your other rule for you to paste on your mirror to look at every morning: A good solder connection should be clean, free of pits and holes with a smooth, slightly concave, feathered fillet. [Don't sweat the "bright and shiny" stuff. They don't count any longer. That's granpa stuff.]
Now onto your "crystalized joint" ... using the term "crystalized joint" is pretty much meaningless, because all solder connections are "crystalized" to one degree or another. The grain of a solder connection increases with time and temperature.
Consider this: With our most innocuous, kindly assessment; your lumpy solder connection is a process indicator. A process indicator requires that you investigate and determine the cause of this anomoly, and then convince yourself that it's acceptable.
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