I see this a lot with people who use bottled pH up or pH down. Especially from canna-oriented companies.
You end up chasing your tail and buying more products when the root cause is the bottled stuff in the first place.
Once you stop growing with bottles and synthetics, all these problems stop.
To quick fix a pH problem, put a handful or two of gypsum in a quart jar, water, and a teaspoon or two of vinegar. Let sit for a day after shaking vigorously. Dilute with water and water into soil.
Water in lime to bring pH up, water in a teaspoon of vinegar to bring pH down. N and P also bring pH down, cations bring pH up.
TL:DR
The biggest culprits in growing are pH down/up, Cal/Mag, bottled nutes. These were all created in the industry back in the 80’s to force growers to keep buying more and more of their different products to fix a problem caused by their products