Agreed, sounds like a neurological issue. Wobble is a specific neurological issue tied to genetics, so unless your snake was a spider or one of the other wobble morphs, it was not actually wobble. (And most spiders do not present nearly that sort of wobble without additional stressors or health issues potentially caused or exacerbated by many I list below)
None of us can see your snake nor know for sure without a substantial amount of additional info, but here are some possibilities you can consider looking into. Many should be easy to rule out, but confirming one could be impossible...
Most commonly neuro issues are caused by either heat or chemicals in some form.
Heat, such as unregulated heat lamps or heat mats, can cause it. As can using a dimmer to control the heat and the house heating up during the day while no one is home to see it or light from a window baking them through the greenhouse effect. Especially an issue in glass tanks since the extra glass layer will magnify it more than a tub.
Alternatively is chemical. Most people are good about thinking of not spraying bug killers near their snake's cage, but there are a lot of possibilities besides that. Most commonly unknown is scented candles in the room or plug in air fresheners or smoking/vaping. Those chemicals and smoke can do some major damage to snakes. Along those lines are products like febreeze, failure to fully rinse off cage decor when washed with bleach (residual vapor), or even non-label use of things like reptile mite sprays.
On top of that, rodents can be treated with pesticides for mites and other issues (including antibiotics) which if not allowed to exit their system before being frozen or fed off live will harm the snake and can present various symptoms including neurological as well. Many medications for rodents have multi-month periods to exit the system and a disreputable rodent vendor could be a potential culprit. (Or pesticides sprayed at a pet store that got onto a rat you bought.... etc.)
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